Microbiological transformation of iron in soil
2011
Krol, M.J.,Instytut Uprawy Nawozenia i Gleboznawstwa, Pulawy (Poland)
Some plants cope with low iron availability in soil by excreting hydrogen ions from roots, which lowers the pH at the root interface and increases the solubility of iron from iron hydroxides. Alfalfa and corn are tolerant of low iron availability. Soil microorganisms play an important role in transformations of iron which go on in different ways. Certain bacteria oxidize ferrous iron to ferric state which then precipitates as ferric hydroxide around cells. Many heterotrophic species attack soluble organic iron salts and convert them into in organic salts. A number of bacteria and fungi produce acid such as carbonic, nitric, sulphuric and organic acids which cause the iron soluble
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